US12018461B2 - Shovel - Google Patents

Shovel Download PDF

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Publication number
US12018461B2
US12018461B2 US17/036,326 US202017036326A US12018461B2 US 12018461 B2 US12018461 B2 US 12018461B2 US 202017036326 A US202017036326 A US 202017036326A US 12018461 B2 US12018461 B2 US 12018461B2
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Prior art keywords
shovel
traveling
lower traveling
valve
traveling body
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US17/036,326
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US20210010241A1 (en
Inventor
Takashi Nishi
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Sumitomo SHI Construction Machinery Co Ltd
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Sumitomo SHI Construction Machinery Co Ltd
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Assigned to SUMITOMO CONSTRUCTION MACHINERY CO., LTD. reassignment SUMITOMO CONSTRUCTION MACHINERY CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NISHI, TAKASHI
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with two or more pumps
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2025—Particular purposes of control systems not otherwise provided for
    • E02F9/2045—Guiding machines along a predetermined path
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/431—Control of dipper or bucket position; Control of sequence of drive operations for bucket-arms, front-end loaders, dumpers or the like
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/2025—Particular purposes of control systems not otherwise provided for
    • E02F9/2041—Automatic repositioning of implements, i.e. memorising determined positions of the implement
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2253—Controlling the travelling speed of vehicles, e.g. adjusting travelling speed according to implement loads, control of hydrostatic transmission
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2282—Systems using center bypass type changeover valves
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2296—Systems with a variable displacement pump
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
    • E02F3/435—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like
    • E02F3/437—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like providing automatic sequences of movements, e.g. linear excavation, keeping dipper angle constant

Definitions

  • a shovel with a traveling lever and a traveling pedal is known.
  • This disclosure relates to a shovel.
  • a shovel includes a lower traveling body, an upper swiveling body that is mounted on the lower traveling body so as to be able to swivel, a traveling actuator that drives the lower traveling body, and a control device that is provided in the upper swiveling body, wherein the control device operates the traveling actuator based on information about a target position.
  • the above-described means provide a shovel that can reduce burden on a traveling operation.
  • FIG. 1 is a side view of a shovel according to an embodiment of the present invention.
  • FIG. 2 is a plane view of the shovel illustrated in FIG. 1 .
  • FIG. 3 is a diagram illustrating an example of a structure of a hydraulic system mounted on the shovel illustrated in FIG. 1 .
  • FIG. 4 A is a view of a part of a hydraulic system for an operation of an arm cylinder.
  • FIG. 4 B is a view of a part of a hydraulic system for an operation of a boom cylinder.
  • FIG. 4 C is a view of a part of a hydraulic system for an operation of a bucket cylinder.
  • FIG. 4 D is a view of a part of a hydraulic system for an operation of a swiveling hydraulic motor.
  • FIG. 5 A is a view of a part of a hydraulic system for an operation of a left traveling hydraulic motor.
  • FIG. 5 B is a view of a part of a hydraulic system for an operation of a right traveling hydraulic motor.
  • FIG. 6 is a functional block diagram of a controller.
  • FIG. 7 illustrates an example of displaying a setting screen.
  • FIG. 8 illustrates another example of the displaying setting screen.
  • FIG. 9 is a plan view of a shovel for performing a slope work.
  • FIG. 10 is a functional block diagram illustrating another structural example of the controller.
  • FIG. 11 illustrates a structural example of an electric operation system.
  • FIG. 12 is a schematic diagram illustrating a structural example of a management system of the shovel.
  • the shovel described above an operator needs to continue to operate at least one of the traveling lever and the traveling pedal so that the shovel is continuously caused to travel. Therefore, the shovel described above may cause the operator to feel annoyed with a traveling operation.
  • FIG. 1 is a side view of the shovel 100 and FIG. 2 is a plan view of the shovel 100 .
  • the lower traveling body 1 of the shovel 100 includes a crawler 1 C.
  • the crawler 1 C is driven by a traveling hydraulic motor 2 M as a traveling actuator mounted on the lower traveling body 1 .
  • the crawler 1 C includes a left crawler 1 CL and a right crawler 1 CR.
  • the left crawler 1 CL is driven by a left traveling hydraulic motor 2 ML
  • the right crawler 1 CR is driven by a right traveling hydraulic motor 2 MR.
  • the upper swiveling body 3 is mounted on the lower traveling body 1 through the swiveling mechanism 2 so as to be able to swivel.
  • the swiveling mechanism 2 is driven by a swiveling hydraulic motor 2 A as a swiveling actuator mounted on the upper swiveling body 3 .
  • the swiveling actuator may be a swiveling motor generator as an electric actuator.
  • a boom 4 is attached to the upper swiveling body 3 .
  • An arm 5 is attached to the tip end of the boom 4
  • a bucket 6 as an end attachment is attached to the tip end of the arm 5 .
  • the boom 4 , arm 5 , and bucket 6 form an excavation attachment AT, which is an example of the attachment.
  • the boom 4 is driven by a boom cylinder 7
  • an arm 5 is driven by an arm cylinder 8
  • a bucket 6 is driven by a bucket cylinder 9 .
  • the boom cylinder 7 , the arm cylinder 8 , and the bucket cylinder 9 form an attachment actuator.
  • the boom 4 is rotatably supported up and down with respect to the upper swiveling body 3 .
  • the boom angle sensor S 1 is mounted on the boom 4 .
  • the boom angle sensor S 1 can detect the boom angle ⁇ 1 , which is the rotation angle of the boom 4 .
  • the boom angle ⁇ 1 is, for example, the angle of rise from the state where the boom 4 is lowered most. Therefore, the boom angle ⁇ 1 is maximized when the boom 4 is raised to the maximum.
  • the arm 5 is rotatably supported relative to the boom 4 .
  • An arm angle sensor S 2 is mounted on the arm 5 .
  • the arm angle sensor S 2 can detect the arm angle ⁇ 2 , which is the rotation angle of the arm 5 .
  • the arm angle ⁇ 2 is, for example, an open angle from the most folded state of the arm 5 . Therefore, the arm angle 82 is maximized when the arm 5 is stretched most.
  • the bucket 6 is rotatably supported relative to the arm 5 .
  • a bucket angle sensor S 3 is mounted on the bucket 6 .
  • the bucket angle sensor S 3 can detect the bucket angle 83 , which is the rotation angle of the bucket 6 .
  • the bucket angle ⁇ 3 is the opening angle from the most closed state of the bucket 6 . Therefore, the bucket angle ⁇ 3 is maximized when the bucket 6 is opened most.
  • the boom angle sensor S 1 , the arm angle sensor S 2 , and the bucket angle sensor S 3 each forms a combination of an acceleration sensor and a gyro sensor. However, it may be form with only the acceleration sensor.
  • the boom angle sensor S 1 may be a stroke sensor mounted on the boom cylinder 7 , a rotary encoder, a potentiometer, an inertia measuring device, or the like. The same applies to the arm angle sensor S 2 and the bucket angle sensor S 3 .
  • the upper swiveling body 3 is provided with a cabin 10 as an operator's cab and a power source such as an engine 11 is mounted thereon.
  • a space recognition device 70 a direction detecting device 71 , a positioning device 73 , a body inclination sensor S 4 , and a swivel angular velocity sensor S 5 are mounted on the upper swiveling body 3 .
  • the cabin 10 is provided with an operation device 26 , a controller 30 , an information input device 72 , a display device D 1 , a voice output device D 2 , or the like.
  • the side where the excavation attachment AT is mounted in the upper swiveling body 3 is the front side
  • the side where the counterweight is mounted is the rear side.
  • a space recognition device 70 is configured to recognize an object present in the three-dimensional space around the shovel 100 .
  • the space recognition device 70 is configured to compute the distance from the space recognition device 70 or the shovel 100 to the recognized object.
  • the space recognition device 70 may be, for example, an ultrasonic sensor, a millimeter wave radar, a monocular camera, a stereo camera, a LIDAR, a distance image sensor, or an infrared sensor.
  • the spatial recognition device 70 is a LIDAR and is configured to emit a large number of laser beams in a number of directions and receive the reflected light to compute the distance and the direction of an object from the reflected light.
  • the space recognition device 70 includes a frontward sensor 70 F mounted at the upper surface front end of the cabin 10 , a backward sensor 70 B mounted at the upper surface back end of the upper swiveling body 3 , a leftward sensor 70 L mounted at the upper surface left end of the upper swiveling body 3 , and a rightward sensor 70 R mounted at the upper surface right end of the upper swiveling body 3 .
  • An upper sensor for recognizing the object present in a space above the upper swiveling body 3 may be attached to the shovel 100 .
  • the space recognition device 70 may be configured to capture images of the perimeter of the shovel 100 .
  • the space recognition device 70 is, for example, a monocular camera having an imaging device such as a CCD or CMOS, and outputs the captured image to the display device D 1 .
  • the space recognition device 70 may be configured to sense a predetermined object within a predetermined area set around the shovel 100 . Said differently, the space recognition device 70 may be configured to identify at least one of a type, a position, a shape, etc. of the object. For example, the space recognition device 70 may be configured to distinguish between a person and the object other than the person. In addition, the space recognition device 70 may be configured to identify the type of land form around the shovel 100 . The type of the land form may be, for example, a hole, a slope face, or a river. In addition, the space recognition device 70 may be configured to identify the type of an obstacle.
  • the type of the obstacle is, for example, a wire, pole, person, animal, vehicles, work equipment, construction machinery, building, or fence, etc.
  • the space recognition device 70 may be configured to specify the type or size of a dump truck as a vehicle. Further, the space recognition device 70 may be configured to detect a person by recognizing a helmet, safety vest, or work clothing, or by identifying a predetermined mark on the helmet, safety vest, or work clothing. In addition, the space recognition device 70 may be configured to recognize the state of the road surface. Specifically, the space recognition device 70 may be configured to specify, for example, the type of object present on the road surface. The type of the object present on the road surface is, for example, tobacco, a can, PET bottle, or stone.
  • the direction detection device 71 is configured to detect information regarding a relative relationship between the direction of the upper swiveling body 3 and the direction of the lower traveling body 1 .
  • the direction detection device 71 may be formed by, for example, a combination of a geomagnetic sensor mounted on the lower traveling body 1 and a geomagnetic sensor mounted on the upper swiveling body 3 .
  • the direction detection device 71 may be formed by a combination of a GNSS receiver mounted on the lower traveling body 1 and a GNSS receiver mounted on the upper swiveling body 3 .
  • the direction detection device 71 may be a rotary encoder, a rotary position sensor, or the like.
  • a direction detection device 71 may be made of a resolver.
  • the direction detection device 71 may be mounted, for example, in a center joint disposed in connection with the swiveling mechanism 2 for realizing the relative rotation between the lower traveling body 1 and the upper swiveling body 3 .
  • the direction detection device 71 may include a camera mounted on the upper swiveling body 3 .
  • the direction detection device 71 performs known image processing on an image (input image) captured by a camera mounted on the upper swiveling body 3 and detects the image of the lower traveling body 1 included in the input image.
  • the direction detection device 71 specifies the longitudinal direction of the lower traveling body 1 by detecting an image of the lower traveling body 1 using a known image recognition technique. Then, an angle formed between the direction of the front and back axes of the upper swiveling body 3 and the longitudinal direction of the lower traveling body 1 is obtained.
  • the direction of the front and back axes of the upper swiveling body 3 is obtained from a camera mounting position.
  • the direction detecting device 71 can determine the longitudinal direction of the lower traveling body 1 by detecting an image of the crawler 1 C.
  • the direction detection device 71 may be integrated with the controller 30 .
  • the information input device 72 is configured so that the operator of the shovel can input information to the controller 30 .
  • the information input device 72 is a switch panel located adjacent to a display unit of the display device D 1 .
  • the information input device 72 may be a touch panel disposed on the display unit of the display device D 1 or a voice input device such as a microphone disposed in the cabin 10 .
  • the information input device 72 may be a communication device. In this case, the operator can input information to the controller 30 via a communication terminal, such as a smartphone.
  • the positioning device 73 is configured to measure the present position.
  • the positioning device 73 is a GNSS receiver that detects the position of the upper swiveling body 3 and outputs the detected value to the controller 30 .
  • the positioning device 73 may be a GNSS compass. In this case, the positioning device 73 can detect the position and direction of the upper swiveling body 3 .
  • the body inclination sensor S 4 detects an inclination of the upper swiveling body 3 relative to a predetermined plane.
  • the body inclination sensor S 4 is an acceleration sensor that detects an inclination angle about the front and back axes of the upper swiveling body 3 with respect to the horizontal plane and an inclination angle about the right and left axes.
  • the front and back and left and right axes of the upper swiveling body 3 pass through a shovel center point, which is a point on the swivel axis of the shovel 100 perpendicular to each other, for example.
  • the swivel angular velocity sensor S 5 detects the swivel angular velocity of the upper swiveling body 3 .
  • it is a gyro sensor. It may be a resolver, rotary encoder, or the like.
  • the swivel angular velocity sensor S 5 may detect the swivel velocity.
  • the swivel velocity may be computed from the swivel angular velocity.
  • At least one of the boom angle sensor S 1 , the arm angle sensor S 2 , the bucket angle sensor S 3 , the body inclination sensor S 4 , and the swivel angular velocity sensor S 5 is also referred to as an attitude detection device.
  • the direction of the drilling attachment AT is detected, for example, based on the outputs of the boom angle sensor S 1 , the arm angle sensor S 2 and the bucket angle sensor S 3 , respectively.
  • the display device D 1 is a device for displaying information.
  • the display device D 1 is a liquid crystal display located within the cabin 10 .
  • the display device D 1 may be a display of a communication terminal such as a smartphone.
  • the voice output device D 2 is a device that outputs voice.
  • the voice output device D 2 includes a device for outputting voice to an operator within the cabin 10 and at least one of the device for outputting voice to an operator outside the cabin 10 . It may be a speaker attached to the communication terminal.
  • the operation device 26 is a device used by the operator to operate the actuator.
  • the controller 30 is a control device for controlling the shovel 100 .
  • the controller 30 is formed by a computer including a CPU, RAM, NVRAM, ROM, or the like.
  • the controller 30 reads programs corresponding to each function from the ROM and loads the program to the RAM, and performs the corresponding processing to the CPU.
  • Each function includes, for example, a machine guidance function that guides an operator's manual operation of the shovel 100 and a machine control function that supports or causes the operator's manual operation of the shovel 100 to operate automatically or autonomously.
  • FIG. 3 is a diagram illustrating an example of a structure of a hydraulic system mounted on the shovel 100 .
  • the mechanical power transmission system, hydraulic oil line, pilot line, and electric control system are indicated by double, solid, dashed, and broken lines, respectively.
  • the hydraulic system of the shovel 100 primarily includes an engine 11 , a regulator 13 , a main pump 14 , a pilot pump 15 , a control valve 17 , an operation device 26 , a discharge pressure sensor 28 , an operation pressure sensor 29 , a controller 30 , and the like.
  • the hydraulic system is configured to circulate the hydraulic oil from the main pump 14 driven by the engine 11 to the hydraulic oil tank via a center bypass tube 40 or a parallel tube 42 .
  • the engine 11 is a driving source of the shovel 100 .
  • the engine 11 is, for example, a diesel engine that operates to maintain a predetermined speed.
  • the output shaft of the engine 11 is coupled to the input shaft of the main pump 14 and pilot pump 15 .
  • the main pump 14 is configured to supply the hydraulic oil to the control valve 17 via the hydraulic oil line.
  • the main pump 14 is a swash plate variable displacement hydraulic pump.
  • the regulator 13 is configured to control the discharge amount of the main pump 14 .
  • the regulator 13 controls the discharge amount of the main pump 14 by adjusting the tilt angle of the main pump 14 in response to a control command from the controller 30 .
  • the pilot pump 15 is configured to supply the hydraulic oil through a pilot line to a hydraulic control device including the operation device 26 .
  • the pilot pump 15 is a fixed capacitive hydraulic pump.
  • the control valve 17 is a hydraulic controller for controlling the hydraulic system at the shovel 100 .
  • the control valve 17 includes controlling valves 171 - 176 .
  • the controlling valve 175 includes a controlling valve 175 L and controlling valve 175 R
  • the controlling valve 176 includes a controlling valve 176 L and controlling valve 176 R.
  • the control valve 17 is configured to selectively supply one or more hydraulic actuators through the controlling valves 171 - 176 to the hydraulic oil discharged by the main pump 14 .
  • the controlling valves 171 - 176 control, for example, the flow of hydraulic oil from the main pump 14 to the hydraulic actuator and the flow of hydraulic oil from the hydraulic actuator to the hydraulic oil tank.
  • the hydraulic actuators include a boom cylinder 7 , arm cylinder 8 , bucket cylinder 9 , left traveling hydraulic motor 2 ML, right traveling hydraulic motor 2 MR, and swiveling hydraulic motor 2 A.
  • the operation device 26 is a device used to operate the actuator by the operator.
  • the operation device 26 includes, for example, an operation lever and an operation pedal.
  • the actuator includes at least one of a hydraulic actuator and an electric actuator.
  • the operation device 26 is configured to supply the hydraulic oil discharged by the pilot pump 15 to a pilot port of a corresponding control valve within the control valve 17 via a pilot line.
  • the pressure (pilot pressure) of the hydraulic oil supplied to each of the pilot ports is the pressure corresponding to the direction and operation amount of the operation device 26 corresponding to each of the hydraulic actuators.
  • the operation device 26 may be electrically controlled rather than a pilot pressure system as described above.
  • the control valve in the control valve 17 may be a electromagnetic spool valve.
  • the discharge pressure sensor 28 is configured to detect the discharge pressure of the main pump 14 . Within this embodiment, the discharge pressure sensor 28 outputs the detected value to the controller 30 .
  • the operation pressure sensor 29 is configured to detect the content of an operation of the operation device 26 by the operator.
  • the operation pressure sensor 29 detects the operation direction and the operation amount of the operation device 26 corresponding to each of the actuators in a form of pressure (operating pressure) and outputs the detected value to the controller 30 .
  • the content of the operation of the operation device 26 may be detected using a sensor other than an operation pressure sensor.
  • the main pump 14 includes a left main pump 14 L and a right main pump 14 R.
  • the left main pump 14 L circulates a hydraulic oil through the left center bypass tube 40 L or the left parallel tube 42 L to a hydraulic oil tank
  • the right main pump 14 R circulates hydraulic oil through the right center bypass tube 40 R or the right parallel tube 42 R to the hydraulic oil tank.
  • the left center bypass tube 40 L is a hydraulic oil line passing through the controlling valves 171 , 173 , 175 L and 176 L that are disposed within the control valve 17 .
  • the right center bypass tube 40 R is a hydraulic oil line passing through the control valves 172 , 174 , 175 R and 176 R that are disposed within the control valve 17 .
  • the controlling valve 171 is a spool valve which feeds the hydraulic oil discharged by the left main pump 14 L to the left traveling hydraulic motor 2 ML and switches the flow of the hydraulic oil in order to discharge the hydraulic oil discharged by the left traveling hydraulic motor 2 ML to the hydraulic oil tank.
  • the controlling valve 172 is a spool valve which feeds the hydraulic oil discharged by the right main pump 14 R to the right traveling hydraulic motor 2 MR and switches the flow of hydraulic oil in order to discharge the hydraulic oil discharged by the right traveling hydraulic motor 2 MR to the hydraulic oil tank.
  • the controlling valve 173 is a spool valve that supplies the hydraulic oil discharged by the left main pump 14 L to the swiveling hydraulic motor 2 A and switches the flow of hydraulic oil in order to discharge the hydraulic oil discharged by the swiveling hydraulic motor 2 A to the hydraulic oil tank.
  • the controlling valve 174 is a spool valve which feeds the hydraulic oil discharged by the right main pump 14 R to the bucket cylinder 9 and switches the flow of hydraulic oil in order to discharge the hydraulic oil in the bucket cylinder 9 to the hydraulic oil tank.
  • the controlling valve 175 L is a spool valve which switches the flow of hydraulic oil in order to supply the hydraulic oil discharged by the left main pump 14 L to the boom cylinder 7 .
  • the controlling valve 175 R is a spool valve which feeds the hydraulic oil discharged by the right main pump 14 R to the boom cylinder 7 and switches the flow of hydraulic oil in order to discharge the hydraulic oil in the boom cylinder 7 to the hydraulic oil tank.
  • the controlling valve 176 L is a spool valve which feeds the hydraulic oil discharged by the left main pump 14 L to the arm cylinder 8 and switches the flow of hydraulic oil in order to discharge the hydraulic oil in the arm cylinder 8 to the hydraulic oil tank.
  • the controlling valve 176 R is a spool valve which feeds the hydraulic oil discharged by the right main pump 14 R to the arm cylinder 8 and switches the flow of the hydraulic oil in order to discharge the hydraulic oil in the arm cylinder 8 to the hydraulic oil tank.
  • the left parallel tube 42 L is a hydraulic oil line disposed in parallel to the left center bypass tube 40 L.
  • the left parallel tube 42 L can supply the hydraulic oil to the control valves on the downstream side when the flow of the hydraulic oil passing through the left center bypass tube 40 L is restricted or interrupted by either one of the controlling valves 171 , 173 , and 175 L.
  • the right parallel tube 42 R is a hydraulic oil line disposed in parallel to the right center bypass tube 40 R.
  • the right parallel tube 42 R can supply the hydraulic oil to the control valves on the downstream side when the flow of the hydraulic oil passing through the right center bypass tube 40 R is limited or shut off by either one of the control valves 172 , 174 , and 175 R.
  • the regulator 13 includes a left regulator 13 L and a right regulator 13 R.
  • the left regulator 13 L controls the discharge amount of the left main pump 14 L by adjusting the tilt angle of the swash plate of the left main pump 14 L in accordance with the discharge pressure of the left main pump 14 L. Specifically, the left regulator 13 L adjusts the tilt angle of a swash plate of the left main pump 14 L in response to an increase in the discharge pressure of the left main pump 14 L to reduce the discharge amount. The same applies to the right regulator 13 R. This is provided that the absorbed horsepower of the main pump 14 , which is expressed as the product of the discharge pressure and the discharge amount, does not exceed the output horsepower of the engine 11 .
  • the operation device 26 includes a left operation lever 26 L, a right operation lever 26 R, and a traveling lever 26 D.
  • the traveling lever 26 D includes a left traveling lever 26 DL and a right traveling lever 26 DR.
  • the left operation lever 26 L is used for the swivel operation and the operation of the arm 5 .
  • the left operation lever 26 L when operated in forward and backward directions, utilizes the hydraulic oil discharged by the pilot pump 15 to Introduce a control pressure according to the lever operation amount into the pilot port of the controlling valve 176 .
  • the hydraulic oil discharged by the pilot pump 15 is used to introduce the control pressure according to the lever operation amount into a pilot port of the controlling valve 173 .
  • the left operation lever 26 L introduces the hydraulic oil to the right pilot port of the controlling valve 176 L and introduces the hydraulic oil to the left pilot port of the controlling valve 176 R when operated in the arm folding direction.
  • the left operation lever 26 L when operated in an arm stretching direction, introduces the hydraulic oil to the left pilot port of the controlling valve 176 L and introduces the hydraulic oil to the right pilot port of the controlling valve 176 R.
  • the left operation lever 26 L introduces the hydraulic oil to the left pilot port of the controlling valve 173 when it is operated in the left swiveling direction and introduces hydraulic oil to the right pilot port of the controlling valve 173 when it is operated in the right swiveling direction.
  • the right operation lever 26 R is used to operate the boom 4 and the bucket 6 .
  • the right operation lever 26 R utilizes the hydraulic oil discharged by the pilot pump 15 when operated in the forward and backward directions to introduce a control pressure according to the lever operation amount into the pilot port of the controlling valve 175 .
  • the hydraulic oil discharged by the pilot pump 15 is used to introduce the control pressure according to the amount of lever operated into the pilot port of the controlling valve 174 .
  • the right operation lever 26 R introduces the hydraulic oil to the left pilot port of the controlling valve 175 R when operated in the boom lowering direction.
  • the right operation lever 26 R when operated in the boom heightening direction, introduces the hydraulic oil to the right pilot port of the controlling valve 175 L and introduces the hydraulic oil to the left pilot port of the controlling valve 175 R.
  • the right operation lever 26 R also introduces the hydraulic oil to the right pilot port of the controlling valve 174 when it is operated in the bucket closing direction, and introduces the hydraulic oil to the left pilot port of the controlling valve 174 when it is operated in the bucket opening direction.
  • the traveling lever 26 D is used to operate the crawler 1 C.
  • the left traveling lever 26 DL is used to operate the left crawler 1 CL. It may be configured to interlock with the left traveling pedal.
  • the left traveling lever 26 DL when operated in the forward and backward directions, utilizes the hydraulic oil discharged by the pilot pump 15 to introduce the control pressure according to the lever operation amount into the pilot port of the controlling valve 171 .
  • the right traveling lever 26 DR is used to operate the right crawler 1 CR. It may be configured to interlock with the right traveling pedal.
  • the right traveling lever 26 DR when operated in the forward and backward directions, utilizes the hydraulic oil discharged by the pilot pump 15 to introduce the control pressure according to the lever operation amount into the pilot port of the controlling valve 172 .
  • the discharge pressure sensor 28 includes the discharge pressure sensor 28 L and the discharge pressure sensor 28 R.
  • the discharge pressure sensor 28 L detects the discharge pressure of the left main pump 14 L and outputs a detected value to the controller 30 . The same applies to the discharge pressure sensor 28 R.
  • the operation pressure sensor 29 includes operation pressure sensors 29 LA, 29 LB, 29 RA, 29 RB, 29 DL, and 29 DR.
  • the operation pressure sensor 29 LA detects the content of the operation in the forward and backward directions by the operator relative to the left operation lever 26 L in the form of pressure and outputs the detected value to the controller 30 .
  • the content of the operation is, for example, the lever operation direction and the lever operation amount (lever operation angle).
  • the operation pressure sensor 29 LB detects the content of the operator's operation of the left operation lever 26 L in the rightward and leftward directions in the form of pressure and outputs the detected value to the controller 30 .
  • the operation pressure sensor 29 RA detects the content of an operator's operation of the right operation lever 26 R in the forward and backward directions in the form of pressure and outputs the detected value to the controller 30 .
  • the operation pressure sensor 29 RB detects the content of the operation by the operator in the leftward and rightward directions relative to the right operation lever 26 R in the form of pressure and outputs the detected value to the controller 30 .
  • the operation pressure sensor 29 DL detects the content of the operation in the forward and backward directions relative to the left traveling lever 26 DL by the operator in the form of pressure and outputs the detected value to the controller 30 .
  • the operation pressure sensor 29 DR detects the content of the operation in the forward and backward direction relative to the right traveling lever 26 DR by the operator in the form of pressure and outputs the detected value to the controller 30 .
  • the controller 30 receives the output of the operation pressure sensor 29 and outputs a control command to the regulator 13 as needed to change the discharge amount of the main pump 14 .
  • the controller 30 receives the output of the control pressure sensor 19 disposed in the upstream of the control valve 18 , outputs a control command to the regulator 13 as necessary, and changes the discharge amount of the main pump 14 .
  • the control valve 18 includes a left control valve 18 L and a right control valve 18 R, and the control pressure sensor 19 includes a left control pressure sensor 19 L and a right control pressure sensor 19 R.
  • a left control valve 18 L is disposed between the controlling valve 176 L, which is the lowest, and the hydraulic oil tank. Therefore, the flow of hydraulic oil discharged by the left main pump 14 L is limited by the left control valve 18 L.
  • the left control valve 18 L generates a control pressure for controlling the left regulator 13 L.
  • the left control pressure sensor 19 L is a sensor for detecting this control pressure and outputs a detected value to the controller 30 .
  • the controller 30 controls the discharge amount of the left main pump 14 L by adjusting the tilting angle of the swash plate of the left main pump 14 L in response to the control pressure.
  • the controller 30 decreases the discharge amount of the left main pump 14 L as the control pressure increases, and increases the discharge amount of the left main pump 14 L as the control pressure decreases.
  • the discharge amount of the right main pump 14 R is similarly controlled.
  • the controller 30 reduces the discharge amount of the left main pump 14 L to the allowable minimum discharge amount and suppresses the pressure loss (pumping loss) when the discharged hydraulic oil passes through the left center bypass tube 40 L.
  • the hydraulic oil discharged by the left main pump 14 L flows into the hydraulic actuator to be operated through a control valve corresponding to the hydraulic actuator to be operated.
  • the flow of hydraulic oil discharged by the left main pump 14 L decreases or disappears the amount reaching the left control valve 18 L, thereby lowering the control pressure generated in the upstream of the left control valve 18 L.
  • the controller 30 increases the discharge rate of the left main pump 14 L to circulate sufficient hydraulic oil in the hydraulic actuator to be operated to ensure drive of the hydraulic actuator to be operated.
  • the controller 30 controls the discharge amount of the right main pump 14 R in the same manner.
  • the hydraulic system of FIG. 3 can reduce wasted energy consumption at the main pump 14 in standby conditions.
  • the wasted energy consumption includes a pumping loss caused by the hydraulic oil discharged by the main pump 14 in the center bypass tube 40 .
  • the hydraulic system of FIG. 3 also ensures that sufficient hydraulic fluid is supplied from the main pump 14 to the hydraulic actuator to be actuated when the hydraulic actuator is operated.
  • FIGS. 4 A- 4 D, and 5 A a 5 B are views of a portion of a hydraulic system.
  • FIG. 4 A illustrates a part of the hydraulic system for operation of the arm cylinder 8
  • FIG. 4 B illustrates a part of the hydraulic system for operation of the boom cylinder 7
  • FIG. 4 C illustrates a part of the hydraulic system for operation of the bucket cylinder 9
  • FIG. 4 D illustrates a part of the hydraulic system for operation of the swivel hydraulic motor 2 A.
  • FIG. 5 A illustrates a part of the hydraulic system for the operation of a left traveling hydraulic motor 2 ML
  • FIG. 5 B is a diagram of a portion of the hydraulic system for the operation of a right traveling hydraulic motor 2 MR.
  • the hydraulic system includes a proportional valve 31 , a shuttle valve 32 , and a proportional valve 33 .
  • the proportional valve 31 includes proportional valves 31 AL- 31 FL and 31 AR- 31 FR
  • the shuttle valve 32 includes shuttle valves 32 AL- 32 FL and 32 AR- 32 FR
  • the proportional valve 33 includes proportional valves 33 AL- 33 FL and 33 AR- 33 FR.
  • the proportional valve 31 functions as a control valve for a machine control.
  • the proportional valve 31 is disposed in a pipe connecting the pilot pump 15 and the shuttle valve 32 and is configured to change the flow path area of the line.
  • the proportional valve 31 operates in response to a control command output by the controller 30 .
  • the controller 30 can supply the hydraulic oil discharged by the pilot pump 15 to the corresponding pilot port of the control valve in the control valve 17 via the proportional valve 31 and shuttle valve 32 , regardless of the operator's operation of the operation device 26 .
  • the shuttle valve 32 has two inlet ports and one outlet port. One of the two inlet ports is connected to the operation device 26 and the other is connected to the proportional valve 31 . The outlet port is connected to a corresponding pilot port of control valve inside the control valve 17 .
  • the shuttle valve 32 can cause the higher of the pilot pressure generated by the operation device and the pilot pressure generated by the proportional valve 31 to act on the corresponding pilot port of the control valve.
  • the proportional valve 33 functions as a control valve for controlling a machine, as well as the proportional valve 31 .
  • the proportional valve 33 is disposed in the tube connecting the operation device 26 and shuttle valve 32 and is configured to change the flow path area of the line.
  • the proportional valve 33 operates in response to control commands output by the controller 30 . Therefore, the controller 30 can reduce the pressure of the hydraulic oil discharged by the operation device 26 regardless of the operation of the operation device 26 by an operator and supply the hydraulic oil to the pilot port of the corresponding control valve in the control valve 17 through the shuttle valve 32 .
  • the controller 30 may operate a hydraulic actuator corresponding to the specific operation device 26 even if no operation is performed on the specific operation device 26 .
  • the controller 30 may also forcibly stop the operation of the hydraulic actuator corresponding to the specific operation device 26 even when the operation is performed for the specific operation device 26 .
  • the left operation lever 26 L is used to operate the arm 5 .
  • the left operation lever 26 L utilizes hydraulic oil discharged by the pilot pump 15 to apply a pilot pressure to the pilot port of the controlling valve 176 in response to operation in the forward and backward directions. More specifically, the left operation lever 26 L acts on the right pilot port of the controlling valve 176 L and the left pilot port of the controlling valve 176 R in accordance with the operation amount when operated in the arm folding direction (backward direction).
  • the left operation lever 26 L acts on the left pilot port of the controlling valve 176 L and the right pilot port of the controlling valve 176 R in accordance with the operation amount.
  • the left operation lever 26 L is provided with a switch NS.
  • the switch NS is a push-button switch. The operator can operate the left operation lever 26 L while pressing the switch NS.
  • the switch NS may be provided on the right operation lever 26 R or at other locations within the cabin 10 .
  • the operation pressure sensor 29 LA detects the content of the operation in the forward and backward directions by the operator relative to the left operation lever 26 L in the form of pressure and outputs the detected value to the controller 30 .
  • the proportional valve 31 AL operates in response to an electric current command output by the controller 30 .
  • the pressure of the hydraulic oil introduced from the pilot pump 15 to the right pilot port of the controlling valve 176 L and the left pilot port of the controlling valve 176 R through the proportional valve 31 AL and shuttle valve 32 AL is then adjusted.
  • the proportional valve 31 AR operates in response to the electric current command output by the controller 30 .
  • the pressure of the hydraulic oil introduced from the pilot pump 15 through the proportional valve 31 AR and the shuttle valve 32 AR into the left pilot port of the controlling valve 176 L and the right pilot port of the controlling valve 176 R is then adjusted.
  • the proportional valves 31 AL and 31 AR can adjust the pilot pressure so that the control valves 176 L and 176 R can be stopped at any valve position.
  • This arrangement allows the controller 30 to supply the hydraulic oil discharged by the pilot pump 15 to the right pilot port of the controlling valve 176 L and the left pilot port of the controlling valve 176 R through the proportional valve 31 AL and the shuttle valve 32 AL, regardless of the arm folding operation by the operator. Said differently, the arm 5 can be fully folded.
  • the controller 30 may also supply the hydraulic oil discharged by the pilot pump 15 to the left pilot port of the controlling valve 176 L and the right pilot port of the controlling valve 176 R through the proportional valve 31 AR and shuttle valve 32 AR, regardless of an arm stretching operation by the operator. Said differently, the arm 5 can be fully stretched.
  • the proportional valve 33 AL operates in response to a control command (electric current command) output by the controller 30 .
  • the pilot pressure is then reduced by the hydraulic oil introduced from the pilot pump 15 to the right pilot port of the controlling valve 176 L and the left pilot port of the controlling valve 176 R through the left operation lever 26 L, the proportional valve 33 AL, and the shuttle valve 32 AL.
  • the proportional valve 33 AR operates in response to a control command (the electric current command) output by the controller 30 .
  • the pilot pressure is then reduced by the hydraulic oil introduced from the pilot pump 15 through the left operating lever 26 L, the proportional valve 33 AR, and the shuttle valve 32 AR to the left pilot port of the controlling valve 176 L and the right pilot port of the controlling valve 176 R.
  • the proportional valves 33 AL and 33 AR can adjust the pilot pressure so that the control valves 176 L and 176 R can be stopped at any valve position.
  • the controller 30 can depressurize the pilot pressure acting on the pilot port (the left pilot port of the controlling valve 176 L and the right pilot port of the controlling valve 176 R) on the closing side of the controlling valve 176 and forcibly stop the closing operation of the arm 5 , if necessary, even when the operator is performing the arm folding operation.
  • the same is applied to a case where the stretching operation of the arm 5 is forcibly stopped while the operator is performing the arm stretching operation.
  • the controller 30 may control the proportional valve 31 AR, if desired, even if the operator is performing the arm folding operation, to increase the pilot pressure acting on the pilot port (the right pilot port of the controlling valve 176 L and the left pilot port of the controlling valve 176 R) on the open side of the controlling valve 176 opposite the pilot port on the closed side of the controlling valve 176 , forcing the controlling valve 176 to stop the closing operation of the arm 5 by forcibly returning the controlling valve 176 to the neutral position.
  • the proportional valve 33 AL may be omitted. The same shall apply to the case in which the opening operation of the arm 5 is forcibly stopped when an operator performs the arm stretching operation.
  • the right operation lever 26 R is used to operate the boom 4 .
  • the right operation lever 26 R utilizes the hydraulic oil discharged by the pilot pump 15 to apply a pilot pressure to the pilot port of the controlling valve 175 in response to an operation in the forward and backward directions. More specifically, the right operation lever 26 R acts on the right pilot port of the controlling valve 175 L and the left pilot port of the controlling valve 175 R corresponding to the operation amount when operated in a boom heightening direction (backward direction).
  • the pilot pressure corresponding to the operation amount is applied to the right pilot port of the controlling valve 175 R.
  • the operation pressure sensor 29 RA detects the content of the operator's operation using the to the right operation lever 26 R in the forward and backward directions in the form of pressure and outputs a detected value to the controller 30 .
  • the proportional valve 31 BL operates in response to the electric current command output by the controller 30 .
  • the pilot pressure of the hydraulic oil introduced from the pilot pump 15 through the proportional valve 31 BL and the shuttle valve 32 BL into the right pilot port of the controlling valve 175 L and the left pilot port of the controlling valve 175 R is then adjusted.
  • the proportional valve 31 BR operates in response to the electric current command output by the controller 30 .
  • the pilot pressure of the hydraulic oil introduced from the pilot pump 15 through the proportional valve 31 BR and the shuttle valve 32 BR into the left pilot port of the controlling valve 175 L and the right pilot port of the controlling valve 175 R is then adjusted.
  • the proportional valves 31 BL and 31 BR can adjust the pilot pressure so that the control valves 175 L and 175 R can be stopped at any valve position.
  • This structure allows the controller 30 to supply the hydraulic oil discharged by the pilot pump 15 to the right pilot port of the controlling valve 175 L and the left pilot port of the controlling valve 175 R through the proportional valve 31 BL and shuttle valve 32 BL, regardless of the operator's boom heightening operation. Said differently, the boom 4 can be heightened.
  • the controller 30 may also supply the hydraulic oil discharged by the pilot pump 15 to the right pilot port of the controlling valve 175 R through the proportional valve 31 BR and the shuttle valve 32 BR regardless of the boom lowering operation by the operator. Said differently, the boom 4 can be lowered.
  • the right operation lever 26 R is also used to operate the bucket 6 .
  • the right operation lever 26 R utilizes the hydraulic oil discharged by the pilot pump 15 to apply a pilot pressure to the pilot port of the controlling valve 174 corresponding to the operation in the leftward and rightward directions. More specifically, the right operation lever 26 R causes the pilot pressure, corresponding to the operation amount, to be applied to the left pilot port of the controlling valve 174 when the right operation lever 26 R is operated in the bucket closing direction (left direction).
  • the right operation lever 26 R when right operation lever 26 R operated in the bucket opening direction (right direction), causes the pilot pressure corresponding to the operation amount to act on the right pilot port of the controlling valve 174 .
  • the operation pressure sensor 29 RB detects the content of the operator's operation of the right operation lever 26 R in the leftward and rightward directions in the form of pressure and outputs the detected value to the controller 30 .
  • the proportional valve 31 CL operates in response to the electric current command output by the controller 30 .
  • the pilot pressure is then adjusted by the hydraulic oil introduced from the pilot pump 15 to the left pilot port of the controlling valve 174 through the proportional valve 31 CL and shuttle valve 32 CL.
  • the proportional valve 31 CR operates in response to the electric current command output by the controller 30 .
  • the pilot pressure is then adjusted by the hydraulic oil introduced from the pilot pump 15 to the right pilot port of the controlling valve 174 via the proportional valve 31 CR and the shuttle valve 32 CR.
  • the proportional valves 31 CL and 31 CR can adjust the pilot pressure so that the controlling valve 174 can be stopped at an arbitrary valve position.
  • This structure allows the controller 30 to supply the hydraulic oil discharged by the pilot pump 15 to the left pilot port of the controlling valve 174 via the proportional valve 31 CL and shuttle valve 32 CL, regardless of the operator's bucket closing operation. Said differently, the bucket 6 can be closed.
  • the controller 30 may also supply the hydraulic oil discharged by the pilot pump 15 to the right pilot port of the controlling valve 174 through the proportional valve 31 CR and the shuttle valve 32 CR regardless of the operator's bucket opening operation. Said differently, the bucket 6 can be opened.
  • the left operation lever 26 L is also used to operate the swiveling mechanism 2 .
  • the left operation lever 26 L utilizes the hydraulic oil discharged by the pilot pump 15 to apply a pilot pressure to the pilot port of the controlling valve 173 in accordance with the operation in the leftward and rightward directions. More specifically, the left operation lever 26 L causes the pilot pressure corresponding to the operation amount to be actuated on the left pilot port of the controlling valve 173 when the left operation lever 26 L is operated in the left swiveling direction (left direction).
  • the pilot pressure corresponding to the operation amount is applied to the right pilot port of the controlling valve 173 .
  • the operation pressure sensor 29 LB detects the content of the operation in the leftward and rightward directions relative to the left operation lever 26 L by the operator in the form of pressure and outputs the detected value to the controller 30 .
  • the proportional valve 31 DL is operated in response to the electric current command output by the controller 30 .
  • the pilot pressure is then adjusted by the hydraulic oil introduced from the pilot pump 15 to the left pilot port of the controlling valve 173 through the proportional valve 31 DL and shuttle valve 32 DL.
  • the proportional valve 31 DR operates in response to the electric current command output by the controller 30 .
  • the pilot pressure is then adjusted by the hydraulic oil introduced from the pilot pump 15 to the right pilot port of the controlling valve 173 via the proportional valve 31 DR and the shuttle valve 32 DR.
  • the proportional valve 31 DL and 31 DR can adjust the pilot pressure so that the controlling valve 173 can be stopped at any valve position.
  • This structure allows the controller 30 to supply the hydraulic oil discharged by the pilot pump 15 to the left pilot port of the controlling valve 173 through the proportional valve 31 DL and shuttle valve 32 DL regardless of the operator's left swiveling operation. Said differently, the swiveling mechanism 2 can swivel left.
  • the controller 30 may also supply the hydraulic oil discharged by the pilot pump 15 to the right pilot port of the controlling valve 173 via the proportional valve 31 DR and the shuttle valve 32 DR regardless of the operator's right turn operation. Said differently, the swiveling mechanism 2 can swivel right.
  • the controller 30 may automatically rotate or brake the swiveling hydraulic motor 2 A, which is an example of the actuator, in order to directly face the upper swiveling body 3 to a target construction surface by controlling at least one of the proportional valve 31 DL, the proportional valve 31 DR, the proportional valve 33 DL, and the proportional valve 33 DR by the electric current command.
  • the condition in which the upper swiveling body 3 of the shovel 100 directly faces the target construction surface is such that the tip end of the attachment (e.g., the toe or back surface of the bucket 6 as a working portion) can be moved along the inclined direction of the target construction surface (e.g., rising slope surface) in accordance with the operation of the attachment.
  • the tip end of the attachment e.g., the toe or back surface of the bucket 6 as a working portion
  • the inclined direction of the target construction surface e.g., rising slope surface
  • the state in which the upper swiveling body 3 of the shovel 100 directly faces the target construction surface is a state in which an attachment working surface (a virtual plane including the center line of the attachment) perpendicular to the swivel plane (a virtual plane perpendicular to the swivel axis) of the shovel 100 includes a normal line of the target construction surface (in other words, a state of following the normal line of the target construction surface).
  • the shovel 100 is unable to move the tip end of the attachment along the direction of inclining the target construction surface when an attachment working surface of shovel 100 is not in a state containing the normal of the target construction surface, i.e., when the upper swiveling body 3 does not faces the target construction surface. As a result, the shovel 100 cannot properly form the target construction surface.
  • the controller 30 automatically rotates the swiveling hydraulic motor 2 A so that the upper swiveling body 3 can directly face to the target execution surface. Thus, the shovel 100 can properly form the target construction surface.
  • the controller 30 determines that the shovel 100 faces the target construction surface when, for example, the vertical distance between the left end of the toe of the bucket 6 and the target construction surface (hereinafter, referred to as the “left end vertical distance”) is equal to the vertical distance between the right end of the toe of the bucket 6 and the target construction surface (hereinafter, referred to as the “right end vertical distance”).
  • the controller 30 may determine that the shovel 100 faces the target construction surface when the left end vertical distance is not equal to the right end vertical distance (i.e., the difference between the left end vertical distance and the right end vertical distance is zero) but less than a predetermined value. Thereafter, when the difference is less than or equal to the predetermined value, the controller 30 decelerates and stops the swiveling hydraulic motor 2 A by means of a braking control of the swiveling hydraulic motor 2 A.
  • tandem control may be performed during a scoop-up operation to load temporary dirt into the dump truck.
  • the controller 30 sets a target excavation trajectory, which is the trajectory that the toe of the bucket 6 should follow, to take dirt and sand of a desired volume (target excavation volume) into the bucket 6 in a single excavation operation.
  • the controller 30 may be positioned in a virtual plane perpendicular to an attachment operating surface when moving the toe of the bucket 6 along a target excavation trajectory, and may face the upper swiveling body 3 .
  • the target excavation trajectory is changed each time a scooping and removing operation is performed. Therefore, the shovel 100 discharges the dirt to the loading platform of the dump truck and then aligns the upper swiveling body 3 with the virtual plane perpendicular to the operation surface of the attachment when the toe of the bucket 6 is moved along the newly set target excavation trajectory.
  • the left traveling lever 26 DL is used to operate the left crawler 1 CL.
  • the left traveling lever 26 DL utilizes hydraulic oil discharged by the pilot pump 15 to apply a pilot pressure to the pilot port of the controlling valve 171 corresponding to the operation in the forward and backward directions.
  • the left traveling lever 26 DL when operated in the traveling forward direction (forward direction), causes the pilot pressure to act on the left pilot port of the controlling valve 171 in accordance with the operation amount.
  • the pilot pressure is applied to the right pilot port of the controlling valve 171 according to the operation amount.
  • the operation pressure sensor 29 DL detects the content of the operator's operation of the left traveling lever 26 DL in the forward and backward directions in the form of pressure and outputs the detected value to the controller 30 .
  • the proportional valve 31 EL operates in response to the electric current command output by the controller 30 .
  • the pilot pressure is then adjusted by the hydraulic oil introduced from the pilot pump 15 to the left pilot port of the controlling valve 171 via the proportional valve 31 EL and shuttle valve 32 EL.
  • the proportional valve 31 ER operates in response to the electric current command output by the controller 30 .
  • the pilot pressure is then adjusted by the hydraulic oil introduced from the pilot pump 15 to the right pilot port of the controlling valve 171 via the proportional valve 31 ER and the shuttle valve 32 ER.
  • the proportional valves 31 EL and 31 ER can adjust the pilot pressure so that the controlling valve 171 can be stopped at any valve position.
  • This structure allows the controller 30 to supply the hydraulic oil discharged by the pilot pump 15 to the left pilot port of the controlling valve 171 through the proportional valve 31 EL and shuttle valve 32 EL, regardless of the forward left traveling operation by the operator. Said differently, the left crawler 1 CL is made travel forward.
  • the controller 30 may also supply the hydraulic oil discharged by the pilot pump 15 to the right pilot port of the controlling valve 171 through the proportional valve 31 ER and shuttle valve 32 ER regardless of the left traveling backward operation by the operator. Said differently, the left crawler 1 CL can be caused to travel backward.
  • the right traveling lever 26 DR is used to operate the right crawler 1 CR.
  • the right traveling lever 26 DR utilizes the hydraulic oil discharged by the pilot pump 15 to apply a pilot pressure to the pilot port of the controlling valve 1.72 in response to the operation in the forward and backward directions.
  • the right traveling lever 26 DR when actuated in the forward direction, causes the pilot pressure to act on the right pilot port of the controlling valve 172 in accordance with the operation amount.
  • the pilot pressure is applied to the left pilot port of the controlling valve 172 according to the operation amount.
  • the operation pressure sensor 29 DR detects the content of the operation in the forward and backward directions relative to the right traveling lever 26 DR by the operator in the form of pressure and outputs the detected value to the controller 30 .
  • the proportional valve 31 FL operates in response to the electric current command output by the controller 30 .
  • the pilot pressure is then adjusted by the hydraulic oil introduced from the pilot pump 15 to the left pilot port of the controlling valve 172 via the proportional valve 31 FL and the shuttle valve 32 FL.
  • the proportional valve 31 FR operates in response to the electric current command output by the controller 30 .
  • the pilot pressure is then adjusted by the hydraulic oil introduced from the pilot pump 15 to the right pilot port of the controlling valve 172 via the proportional valve 31 FR and the shuttle valve 32 FR.
  • the proportional valves 31 FL and 31 FR can adjust the pilot pressure so that the controlling valve 172 can be stopped at any valve position.
  • This arrangement allows the controller 30 to supply the hydraulic oil discharged by the pilot pump 15 to the right pilot port of the controlling valve 172 via the proportional valve 31 FL and shuttle valve 32 FL regardless of the operator's right forward traveling operation. Said differently, the right crawler 1 CR is made travel forward.
  • the controller 30 may also supply the hydraulic oil discharged by the pilot pump 15 to the left pilot port of the controlling valve 172 via the proportional valve 31 FR and the shuttle valve 32 FR regardless of the right traveling backward operation by the operator. Said differently, the right crawler 1 CR is made travel backward.
  • FIG. 6 is a functional block diagram of the controller 30 .
  • the controller 30 is configured to receive a signal output by at least one of the information acquisition device E 1 and the switch NS, perform various operations, and output control commands to at least one of the proportional valve 31 , the display device D 1 , and the voice output device D 2 .
  • the information acquisition device E 1 detects information about the shovel 100 .
  • the information acquisition device E 1 includes at least one of a boom angle sensor S 1 , an arm angle sensor S 2 , a bucket angle sensor S 3 , an body inclination sensor S 4 , a swivel angular velocity sensor S 5 , a boom rod pressure sensor, a boom bottom pressure sensor, an arm rod pressure sensor, an arm bottom pressure sensor, a bucket rod pressure sensor, a bucket bottom pressure sensor, a boom cylinder stroke sensor, an arm cylinder stroke sensor, a bucket cylinder stroke sensor, a discharge pressure sensor 28 , an operation pressure sensor 29 , a space recognition device 70 , a direction detection device 71 , an information input device 72 , a positioning device 73 , and a communication device.
  • the information acquisition device E 1 acquires at least one of information regarding the shovel 100 , such as a boom angle, an arm angle, a bucket angle, a body inclination angle, a swivel angle, a boom rod pressure, a boom bottom pressure, an arm rod pressure, an arm bottom pressure, a bucket rod pressure, a bucket bottom pressure, a boom stroke amount, an arm stroke amount, a bucket stroke amount, a discharge pressure of the main pump 14 , an operation pressure of the operation device 26 , information regarding an object present in a three-dimensional space around the shovel 100 , information regarding a relative relationship between the direction of the upper swiveling body 3 and the direction of the lower traveling body 1 , information input to the controller 30 , and information regarding the present position.
  • the information acquisition device E 1 may also acquire information from another machine (such as a construction machine or a flying object for acquiring on-site information).
  • the controller 30 has a setting unit 30 A and an autonomous control unit 30 B as a functional element.
  • Each functional element may be formed by hardware or software.
  • the setting unit 30 A is configured to assist the operator in setting various information.
  • the setting unit 30 A is configured to assist in setting the information necessary for autonomously driving the shovel 100 by the operator.
  • the setting unit 30 A is configured to assist the operator in setting the destination.
  • the destination is where the shovel 100 is driven autonomously.
  • the destination is set as the final target position.
  • the setting unit 30 A when a predetermined switch constituting the information input device 72 is operated, the setting unit 30 A is configured to display the setting screen by the display device D 1 provided with a touch panel.
  • the setting screen is, for example, a map image containing the present position of the shovel 100 .
  • the map image may be an image captured by the camera.
  • the operator may set a destination by tapping a point on the map image corresponding to the desired destination, for example.
  • the setting unit 30 A may display the map image used in the setting screen using an API (Application Programming Interface) related to the route search, map, or the like disclosed on an external website.
  • the setting unit 30 A may estimate the construction state based on the information acquired by the information acquisition device E 1 and reflect the estimated construction state in the map image. For example, the setting unit 30 A may simultaneously display the place where burial soil was provided and the place where a surface compaction operation was performed on the map image. The operator may then set the traveling route in consideration of the estimated construction states. Further, the setting unit 30 A may divide the distance from the present position to the destination into a plurality of sections and set the target position for each section.
  • API Application Programming Interface
  • the controller 30 is configured to continuously perform a travel control in each section.
  • the traveling route is changed depending on the situation when the shovel 100 reaches the end (end point) of the first section, the course of the next section and the target position are also changed.
  • the setting unit 30 A is configured to assist the operator in setting the traveling route.
  • the traveling route is the path from the present position of the shovel 100 to the desired destination.
  • the shovel 100 is autonomously driven so that a trajectory drawn by a predetermined portion of the shovel 100 coincides with the traveling route, for example.
  • the predetermined site is, for example, the center point of the shovel 100 .
  • the center point of the shovel 100 is, for example, a point on the swiveling axis of the shovel 100 located at a predetermined height from the contact area of the shovel 100 .
  • the operator drags a finger on a setting screen to connect a point on the map image corresponding to the present position of the shovel 100 to a point on the map image corresponding to the desired destination to set the desired traveling route, for example.
  • the setting unit 30 A may set a destination corresponding to a point where a finger of the operator is separated from the touch panel. In this case, the operator can simultaneously set the traveling route and the destination without setting the destination in advance.
  • the operator may use a button or the like on the switch panel to set the destination and traveling route while moving the cursor.
  • the setting unit 30 A may automatically set the traveling route based on the present position of the shovel 100 , the destination, and the map information when the destination is set.
  • the map information includes, for example, information on ground irregularities and information on features such as a paved road, unpaved road, building, river or pond.
  • the setting unit 30 A may set a traveling route for avoiding an obstacle based on the information acquired by an information acquisition device E 1 including, for example, a communication device or space recognition device 70 , after recognizing the latest work conditions including the position of the obstacle such as a hole, burial soil, material, and dirt (for example, dirt dropped from a dump truck or the like).
  • the material includes a sandbag, tetrapod (“tetrapod” is a registered trademark), concrete block, sheet pile, etc.
  • the setting unit 30 A can set the traveling route in consideration of the latest construction states. Alternatively, the setting unit 30 A may set the traveling route based on the past traveling trajectory. In this case, the controller 30 may be configured to store the traveling trajectory of the shovel 100 on a non-volatile storage medium for a predetermined period of time.
  • the autonomous control unit 30 B is configured to autonomously operate the shovel 100 .
  • the autonomous control unit 30 B is configured to autonomously travel the shovel 100 along the traveling route set by the setting unit 30 A.
  • the autonomous control unit 30 B may, for example, start autonomous traveling of the shovel 100 when the autonomous traveling switch in the switch panel installed in proximity to the display unit of the display device D 1 is depressed.
  • the autonomous travel switch may be a software button displayed on the display D 1 having the touch panel.
  • the autonomous control unit 30 B may start autonomous travel of the shovel 100 when the traveling lever 26 D is tilted while a switch provided at the tip end of the traveling lever 26 D is depressed.
  • the autonomous control unit 30 B may start the autonomous traveling of the shovel 100 when a predetermined operation is performed by a communication terminal carried by the operator outside the cabin 10 .
  • the operator of the shovel 100 may, for example, press the autonomous traveling switch to start autonomous traveling of the shovel 100 at the time of lubrication or at the end of the operation to allow the shovel 100 located at the work site to independently travel to a predetermined position.
  • the autonomous control unit 30 B determines the movement of the actuator based on the set traveling route, for example. For example, when driving the shovel 100 , an appropriate driving method is selected from a spin turn, swivel turn, slow turn, or straight travel to determine how to move the traveling hydraulic motor 2 M. In this case, the autonomous control unit 30 B may determine not only the movement of the traveling actuator such as the traveling hydraulic motor 2 M but also the necessity of the operation of the swiveling mechanism 2 . To prevent contact between the shovel 100 and an external object while driving the shovel 100 in an appropriate position. It may also be determined whether the excavation attachment AT is likely to come into contact with a peripheral device or other construction machine to determine whether operation of the excavation attachment AT is necessary.
  • the autonomous control unit 30 B can operate the actuator autonomously by providing the electric current command to the proportional valve 31 and individually adjusting the pilot pressure acting on the controlling valve corresponding to the actuator.
  • the left traveling hydraulic motor 2 ML can be operated regardless of whether the left traveling lever 26 DL is tilted
  • the right traveling hydraulic motor 2 MR can be operated regardless of whether the right traveling lever 26 DR is tilted.
  • the left traveling hydraulic motor 2 ML can be operated regardless of whether the left traveling pedal has been stepped on.
  • the right traveling hydraulic motor 2 MR can be operated regardless of whether the right traveling pedal has been folded.
  • the arm cylinder 8 and the swiveling hydraulic motor 2 A concerning the left operation lever 26 L and the boom cylinder 7 and bucket cylinder 9 concerning the right operation lever 26 R.
  • the autonomous control unit 30 B is configured to output the electric current command to the proportional valve 31 EL to adjust the pilot pressure acting on the left pilot port of the controlling valve 171 .
  • the autonomous control unit 30 B may be configured to repeatedly acquire information regarding the position of the shovel 100 based on the output of the positioning device 73 at a predetermined control cycle. Further, the direction detecting device 71 may be configured to repeatedly acquire information on the relative relationship between the direction of the upper swiveling body 3 and the direction of the lower traveling body 1 based on the output of the direction detecting device 71 at a predetermined control cycle. The autonomous control unit 30 B may be configured to feed back the acquired information so that the shovel 100 can continue to travel along a desired route in a desired position.
  • the autonomous control unit 30 B can travel the lower traveling body 1 while, for example, the direction of the upper swiveling body 3 and the direction of the lower traveling body 1 are the same. Therefore, it is possible to stabilize the driving attitude of the shovel 100 when, for example, the shovel 100 is driven autonomously over a relatively long distance.
  • the autonomous control unit 30 B may drive the lower traveling body 1 in a state in which the direction of the upper swiveling body 3 is different from the direction of the lower traveling body 1 . Therefore, the shovel 100 can be moved in a short period of time when the shovel 100 is driven autonomously by a relatively short distance, for example, when the shovel 100 is moved intermittently along the slope. This is because the time required for aligning the direction of the upper swiveling body 3 and the direction of the lower traveling body 1 can be omitted.
  • FIG. 7 illustrates an example of the display of the setting screen GS displayed on the display device D 1 .
  • the setting screen GS includes a shovel graphic G 1 , landfill graphic G 2 , sandbag graphic G 3 , river graphic G 4 , irrigation channel graphic G 5 , levee graphic G 6 , paved road graphic G 7 , unpaved road graphic G 8 , office graphic G 9 , parking field graphic G 10 , destination graphic G 11 , and traveling route graphic G 12 .
  • the landfill graphic G 2 and sandbag graphic G 3 may be updated as the work progresses.
  • An actual road corresponding to the paved road graphic G 7 of the setting screen is subjected to a search by an API for route search, etc. published on an external website.
  • the work site of the shovel 100 often do not have nearby roads.
  • the controller 30 may not be able to set the traveling route for moving the shovel 100 from its present position to its destination simply by using the route search function of the externally published API. Therefore, in the present embodiment, the structure in which the traveling route can be set even at the work site of the shovel 100 and the shovel 100 can be moved based on the set route will be described.
  • the shovel graphic G 1 is a figure illustrating the position of the shovel 100 .
  • the shovel 100 includes a shovel 100 A as its own machine in which a display device D 1 is installed and a shovel 100 B as another machine working around the shovel 100 A.
  • the setting screen GS includes a shovel graphic G 1 A corresponding to the shovel 100 A and a shovel graphic G 1 B corresponding to the shovel 100 B.
  • the shovel graphic G 1 A indicates the position of the shovel 100 A.
  • the shovel graphic G 1 B indicates the position of the shovel 100 B.
  • the controller 30 determines the display position of the shovel graphic G 1 A based on the output of the positioning device 73 mounted on the shovel 100 A, for example. The same applies to the shovel graphic G 1 B.
  • the landfill graphic G 2 and sandbag graphic G 3 are examples of graphics generated based on information updated at relatively short intervals. In the example of FIG. 7 , these graphics are generated based on the information output by the space recognition device 70 .
  • the river graphic G 4 , irrigation channel graphic G 5 , levee graphic G 6 , paved road graphic G 7 , unpaved road graphic G 8 , office graphic G 9 , and parking field graphic G 10 are examples of geometrical graphics generated based on information updated at a relatively long interval.
  • the graphics are generated based on map information.
  • the graphics may be part of a map image.
  • the destination graphic G 11 is a graphic displayed when the setting unit 30 A sets the destination. For example, it is displayed when the inside of the parking field graphic G 10 indicated by a dashed line frame is tapped by the operator.
  • the destination graphic G 11 is a circular mark, but may also be a mark having other shapes, such as a triangle, square, or ellipse.
  • the traveling route graphic G 12 is a linear shape displayed when the setting unit 30 A sets the traveling route. For example, when a dragging operation is performed from the position where the shovel graphic G 1 A is displayed, it is displayed along the trajectory of the dragging operation. Then, the traveling route graphic G 12 terminates at a point where the finger is separated from the touch panel. In the example of FIG. 7 , it is displayed as a dashed arrow toward the destination graphic G 11 .
  • the work site of the shovel 100 may be non-uniform in ground stability, as opposed to a place where a road is laid. For this reason, it is desirable to use a route that has been passed once in the past. Accordingly, the setting unit 30 A may set a traveling route such as the shortest route based on the traveling trajectory during past operations.
  • the setting unit 30 A may display the trajectory of the drag operation on the setting screen GS without displaying the traveling route graphic G 12 . To prompt the operator to set the appropriate route.
  • the setting unit 30 A determines that the trajectory of dragging operation is improper when, for example, dragging operation is performed to cross the river diagram G 4 .
  • the autonomous control unit 30 B drives the shovel 100 A autonomously along the set traveling route.
  • the shovel 100 A determines the positions of the material, sandbag, step, burial soil, hole, etc. based on the information acquired by the information acquisition device E 1 , and travels along the traveling route to a point corresponding to the destination graphic G 11 while autonomously avoiding the material, sandbag, step, pile, hole, etc.
  • the operator of the shovel 100 A is seated in the driver seat within the cabin 10 , but may be present outside the cabin 10 . Said differently, the shovel 100 A may perform a driverless operation.
  • the setting screen GS may be displayed continuously while the shovel 100 A is traveling autonomously. This is in order to enable the operator to understand the movement of the shovel 100 A.
  • the landfill graphic G 2 , the sandbag graphic G 3 , the river graphic G 4 , the irrigation channel graphic G 5 , the levee graphic G 6 , the paved road graphic G 7 , the unpaved road graphic G 8 , the office graphic G 9 , and the parking field graphic G 10 in the setting screen GS may be images captured by a flight object such as a quad copter.
  • the operator of the shovel 100 A can independently travel to the destination simply by setting a route to the destination.
  • the controller 30 may perform a travel control so that the set destination (target position) and the center of the shovel 100 A correspond to each other, and the travel control may be performed so that the elevation door of the cabin 10 corresponds to each other.
  • This allows the operator to ride on the shovel 100 A without moving from the car parking lot to the shovel 100 A parking lot. Accordingly, the operator, when boarding the shovel 100 A, does not have to pass through a muddy work site and prevents the inside of the cabin 10 from becoming dirty due to mud or the like.
  • FIG. 8 illustrates another display example of the setting screen GS displayed on the display device D 1 .
  • the autonomous control unit 30 B is configured to autonomously travel the shovel 100 A by causing the shovel 100 B as a preceding object to follow the shovel 100 A without using a traveling route. Therefore, the traveling route is not set and the traveling route graphic G 12 is not displayed.
  • the setting unit 30 A is configured to assist the operator in setting the antenna object.
  • a preceding object as an object (destination) is an object to follow the shovel 100 A when the shovel 100 A is driven autonomously. Typically, it is another shovel that has the same destination.
  • the preceding object may be a person or other self-propelled object such as a vehicle.
  • the operator sets the destination, for example, by tapping a point on the map image corresponding to the desired destination. Then, by tapping the shovel graphic G 1 B corresponding to the shovel 100 B, the shovel 100 B is set as a preceding shovel.
  • the setting unit 30 A may highlight the shovel graphic G 1 B so that the operator can recognize that the shovel 100 B has been set as the preceding shovel.
  • the highlighting includes, for example, blinking.
  • FIG. 8 illustrates a state in which the shovel graphic G 1 B blinks.
  • the operator of the shovel 100 A starts autonomous traveling of the shovel 100 A by pressing an autonomous traveling switch at the time of fuel filling or completing the operation, for example.
  • the shovel 100 A located at the work site follows the shovel 100 B and travels autonomously, stopping when it reaches its destination. If the destination of the shovel 100 A is the same as the destination of the shovel 100 B, the destination setting may be omitted.
  • the autonomous control unit 30 B estimates a traveling trajectory of the shovel 100 B which precedes based on the information acquired by the information acquisition device E 1 including, for example, a communication device or a space recognition device 70 .
  • the autonomous control unit 30 B drives the shovel 100 A autonomously to trace the traveling trajectory. Said differently, the autonomous control unit 30 B performs the travel control of the shovel 100 so that the shovel 100 follows the preceding shovel 100 B.
  • the shovel 100 A may be configured to travel along the traveling trajectory of the shovel 100 B to a point corresponding to the destination graphic G 11 while autonomously avoiding the sandbag, step, hole, or the like.
  • the setting screen GS may be displayed continuously while the shovel 100 A is traveling autonomously. This is to enable the operator to understand the movement of the shovel 100 A.
  • the operator of the shovel 100 A can autonomously drive the shovel 100 A to the destination simply by setting the preceding object.
  • FIG. 9 illustrates a plan view of the shovel 100 a slope work.
  • the graphic 100 X depicted with a dashed line in FIG. 9 indicates the state of the shovel 100 at a position away from a slope
  • the graphic 100 Y depicted with a broken line indicates the state of the shovel 100 when the shovel 100 directly faces the slope
  • the graphic 100 Z depicted with a solid line indicates the state of the current shovel 100 after moving a short distance along the slope.
  • the dot pattern area FS represents the slope after a finishing operation
  • a cross hatch pattern area US represents the slope before performing the finishing operation.
  • the setting unit 30 A is structured to assist the operator in setting the work target.
  • the object of construction is, for example, the slope subject to the slope work, a ground subject to a horizontal drawing operation, or a hole subject to deep excavation work.
  • the operator sets the slope subjected to the slop work as a construction target by designating a part of the image corresponding to the desired slope on the setting screen GS.
  • the setting unit 30 A automatically sets the traveling route from the present position to the construction target based on the present position of the shovel 100 , the position of the construction target, and the map information.
  • the setting unit 30 A may set a traveling route for avoiding an obstacle based on the information acquired by the information acquisition device E 1 including the communication device or the space recognition device 70 after recognizing the latest work conditions including the location of the obstacle, for example.
  • the autonomous control unit 30 B allows the shovel 100 to independently travel along the set traveling route.
  • the shovel 100 travels from a position of the graphic 100 X drawn with a broken line in FIG. 9 to a position of a graphic 100 Y drawn with a broken line along a traveling route shown with an arrow AR 1 .
  • the destination is, for example, the start position of the slope work.
  • the shovel 100 autonomously avoids the material, sandbag, step, burial soil, hole, etc., and travels along the traveling route to the construction target (the slope subject to the slope work).
  • the shovel 100 stops at a point where the shovel 100 directly faces the slope to be subjected to the slope operation, as indicated by the graphic 100 Y depicted by the broken line in FIG. 9 .
  • the shovel 100 stops the lower traveling body 1 in a direction parallel to the X-axis so that it can move along the slope.
  • the shovel 100 may perform a finishing work utilizing a excavation attachment AT.
  • the operator of the shovel 100 is seated in the driver seat within the cabin 10 , but may be outside the cabin 10 . Said differently, the shovel 100 may be subjected to the driverless operation.
  • the operator of the shovel 100 can autonomously drive the shovel 100 to the position of the construction target by merely setting the construction target.
  • the target position used in the drive control of the shovel 100 is set as the target position.
  • the operator can independently travel the shovel 100 to the slope position by simply setting the slope position to be subjected to the slope work and stop the shovel 100 in a state directly facing the slope by using the facing control described above.
  • the autonomous control unit 30 B may be configured to autonomously travel the shovel 100 during a predetermined operation such as a slope work. For example, if the operator of the shovel 100 depresses an autonomous travel switch when the finishing work is completed on a part of the slope subject to the slope work, the autonomous control unit 30 B may allow the shovel 100 to travel autonomously based on the predetermined movement direction and movement distance. In the example of FIG. 9 , the autonomous control unit 30 B moves the shovel 100 to a destination (target position) set at a predetermined distance in an extension direction of the slope (+X direction) as illustrated by an arrow AR 2 each time the autonomous travel switch is depressed. In this case, the destination (target position) may be updated sequentially.
  • the operator of the shovel 100 can move the shovel 100 by a predetermined distance toward the next destination (target position) in the extension direction of the slope by simply pressing the autonomous travel switch, thereby improving the efficiency of the slope finishing operation.
  • FIG. 10 is a functional block diagram illustrating another example of a configuration of the controller 30 .
  • the controller 30 is configured to receive a signal output by at least one of the attitude detecting device, the space recognition device 70 , the information input device 72 , the positioning device 73 , and the abnormality detection sensor 74 , perform various operations, and output control commands to the proportional valve 31 and the proportional valve 33 .
  • the attitude detection device includes a boom angle sensor S 1 , an arm angle sensor S 2 , a bucket angle sensor S 3 , a body inclination sensor S 4 , and a swivel angle velocity sensor S 5 .
  • the controller 30 illustrated in FIG. 10 differs from the controller 30 illustrated in FIG. 6 in that the controller 30 is mainly connected to the abnormal detection sensor 74 and has a target setting unit F 1 , an abnormality monitoring unit F 2 , a stop determination unit F 3 , an intermediate target setting unit F 4 , a position computing unit F 5 , an object detection unit F 6 , a speed command generation unit F 7 , a speed computing unit F 8 , a speed limiting unit F 9 , and a flow rate command producing unit F 10 . Therefore, the description of the common parts is omitted and the differences are described in detail below.
  • the attitude detection unit 30 C is configured to detect information about the attitude of the shovel 100 . In the example of FIG. 10 , the attitude detection unit 30 C determines whether the position of the shovel 100 is a traveling attitude. The attitude detection unit 30 C is configured to allow execution of autonomous traveling of the shovel 100 when it is determined that the attitude of the shovel 100 is a traveling attitude.
  • the target setting unit F 1 is configured to set the target for autonomous traveling of the shovel 100 .
  • the target setting unit F 1 sets the destination (target position) as the destination when the shovel 100 is autonomously driven and sets a target as the traveling route to the destination (target position) or the like.
  • the target setting unit F 1 sets the destination selected by the operator of the shovel 100 using the touch panel (see, for example, the target graphic G 11 of FIG. 7 ) or the destination automatically estimated (see, for example, the graphic 100 Y of FIG. 9 ) as the target position, and sets the traveling route selected by the operator of the shovel 100 using the touch panel (see, for example, the traveling route graphic G 12 of FIG.
  • the operator may not only set the destination (target position) using the display device D 1 of the shovel 100 , but may also set the destination (target position) by remote control from the outside of the shovel 100 using at least one of the support devices 200 and the management device 300 described below.
  • the abnormality monitoring unit F 2 is configured to monitor the abnormality of the shovel 100 .
  • the abnormality monitoring unit F 2 determines the degree of abnormality of the shovel 100 based on the output of the alarm detecting sensor 74 .
  • the abnormality detection sensor 74 is at least one of a sensor for detecting the abnormality in the engine 11 and the sensor for detecting the abnormality in relation to the temperature of the hydraulic oil, a sensor for detecting the abnormality in the controller 30 , and the like.
  • the stop determination unit F 3 is configured to determine whether it is necessary to stop the shovel 100 based on various information. In the example of FIG. 10 , the stop determination unit F 3 determines whether it is necessary to stop the shovel 100 during autonomous traveling based on the output of the abnormality monitoring unit F 2 . Specifically, the stop determination unit F 3 determines that it is necessary to stop the shovel 100 during autonomous traveling when the degree of abnormality of the shovel 100 determined by the abnormality monitoring unit F 2 exceeds a predetermined degree. In this case, for example, the controller 30 controls the traveling hydraulic motor 2 M as a traveling actuator to slow down or stop the rotation of the traveling hydraulic motor 2 M.
  • the stop determination unit F 3 determines that it is not necessary to stop the shovel 100 during autonomous traveling, Said differently, it is possible to continue autonomous traveling of the shovel 100 .
  • the stop determination unit F 3 may determine whether autonomous driving is canceled or not in addition to whether it is necessary to stop the shovel 100 .
  • the intermediate target setting unit F 4 is configured to set an intermediate target for the autonomous traveling of the shovel 100 .
  • the intermediate target setting unit F 4 divides the target route set by the target setting unit F 1 into a plurality of sections and sets the end point of each section as the intermediate target position.
  • the position computing unit F 5 is configured to compute the present position of the shovel 100 .
  • the position computing unit F 5 computes the present position of the shovel 100 based on the output of the positioning device 73 .
  • the target setting unit F 1 may set the end position of the slope work as the final target position.
  • the intermediate target setting unit F 4 may divide the slope work from the start position to the end position into a plurality of sections and set the end point of each section as the intermediate target position.
  • the computing unit C 1 is configured to compute the difference between the intermediate target position set by the intermediate target setting unit F 4 and the present position of the shovel 100 computed by the position computing unit F 5 .
  • the object detection unit F 6 is configured to detect an object present around the shovel 100 .
  • the object detection unit F 6 detects an object present around the shovel 100 based on the output of the spatial recognition device 70 .
  • the object detection unit F 6 generates a stop command for stopping autonomous traveling of the shovel 100 when the object (for example, a person) present in the traveling direction of the shovel 100 during autonomous traveling is detected.
  • the speed command generation unit F 7 is configured to generate a command regarding the traveling speed. In the example of FIG. 10 , the speed command generation unit F 7 generates the speed command based on the difference computed by the computing unit C 1 . Basically, the speed command generation unit F 7 is configured to generate a speed command that is larger as the difference is larger. The speed command generation unit F 7 is configured to generate a speed command that makes the difference computed by the computing unit C 1 close to zero.
  • the speed command generation unit F 7 may change the value of the speed command when it is determined that the shovel 100 is present on a sloping land based on the previously input information on a land form and the detected value of the positioning device 73 . For example, when it is determined that the shovel 100 is on a downhill slope, the speed command generation unit F 7 may generate a speed command corresponding to a speed that is slower than an ordinary speed. The speed command generation unit F 7 may acquire information about the terrain, such as the inclination of the ground, by the spatial recognition device 70 .
  • the speed command generation unit F 7 may generate a speed command corresponding to the speed that is decelerated from the normal speed. As described above, the speed command generation unit F 7 may change the value of the speed command based on the information on the road surface in the traveling route. For example, when the shovel 100 moves from sand to gravel in a riverbed, the speed command generation unit F 7 may automatically change the value of the speed command. Therefore, the speed command generation unit F 7 can change the traveling speed corresponding to the road surface condition.
  • the speed command generation unit F 7 may generate the speed command corresponding to the operation of the attachment. For example, when the shovel 100 is engaged in the slope work (specifically, when the excavation attachment AT is engaged in the finishing work from the top of the slope to the foot of the slope), the intermediate target setting unit F 4 sets the end (end point) of the next section as the target position when it is determined that the bucket 6 has reached the butt of the shoulder. The speed command generation unit F 7 generates the speed command to the target position in the next section. Alternatively, when it is determined that the boom 4 has risen to a predetermined height after the bucket 6 has reached the butt, the intermediate target setting unit F 4 sets the end (end point) of the next section as the target position. The speed command generation unit F 7 may generate the speed command to the next target position. In this manner, the speed command generation unit F 7 may set the target position in response to the operation of the attachment.
  • the controller 30 may include a mode setting unit for setting an operation mode of the shovel 100 .
  • a mode setting unit for setting an operation mode of the shovel 100 .
  • the speed command generation unit F 7 when a crane mode is set as an operation mode of the shovel 100 , or when a slow speed mode, such as a slow-speed high-torque mode, is set, the speed command generation unit F 7 generates the speed command corresponding to the slow mode.
  • the speed command generation unit F 7 can change the traveling speed depending on the state of the shovel 100 .
  • the speed computing unit F 8 is configured to compute the current traveling speed of the shovel 100 .
  • the speed computing unit F 8 computes the current traveling speed of the shovel 100 based on the transition of the present position of the shovel 100 computed by the position computing unit F 5 .
  • the computing unit C 2 is configured to compute the difference between the traveling speed corresponding to the speed command generated by the speed command generation unit F 7 and the current traveling speed of the shovel 100 computed by the speed computing unit F 8 .
  • the speed limiting unit F 9 is configured to limit the speed of the shovel 100 .
  • the speed limiting unit F 9 is configured to output a limit value instead of a speed difference when the speed difference computed by the computing unit C 2 exceeds the limit value, and output the speed difference directly when the speed difference computed by the computing unit C 2 is equal to or less than the limit value.
  • the limit may be a previously registered value or a dynamically computed value.
  • the flow rate command producing unit F 10 is configured to generate a command related to the flow rate of the hydraulic oil fed from the main pump 14 to the traveling hydraulic motor 2 M.
  • the flow rate command producing unit F 10 generates the flow instruction based on the speed difference output by the speed limiting unit F 9 .
  • the flow rate command producing unit F 10 is configured to generate a flow rate command that is larger as the speed difference in the speed is larger.
  • the flow rate command producing unit F 10 is configured to generate a flow rate command for bringing the speed difference computed by the computing unit C 2 close to zero.
  • the flow rate command generated by the flow rate command producing unit F 10 is an electric current command for each of the proportional valves 31 EL, 31 ER, 31 FL, 31 FR, 33 EL, 33 ER, 33 FL, and 33 FR (see FIGS. 5 A and 5 B ).
  • the proportional valves 31 EL and 33 EL operate in response to their electric current commands to vary the pilot pressure acting on the left pilot port of the controlling valve 171 . Therefore, the flow rate of the hydraulic oil flowing into the left traveling hydraulic motor 2 ML is adjusted to be the flow rate corresponding to the flow rate command generated by the flow rate command producing unit F 10 .
  • the proportional valves 31 ER and 33 ER operate in the same manner.
  • the proportional valves 31 FR and 33 FR also operate in response to their electric current commands to vary the pilot pressure acting on the right pilot port of the controlling valve 172 . Therefore, the flow rate of the hydraulic oil flowing into the right traveling hydraulic motor 2 MR is adjusted to be the flow rate corresponding to the flow rate command generated by the flow rate command producing unit F 10 .
  • the proportional valves 31 FL and 33 FL operate in the same manner. As a result, the traveling speed of the shovel 100 is adjusted to be the traveling speed corresponding to the speed command generated by the speed command generation unit F 7 .
  • the traveling speed of the shovel 100 is a concept including a traveling direction. The traveling direction of the shovel 100 is determined on the basis of the rotation speed and rotation direction of the left traveling hydraulic motor 2 ML and the rotation speed and rotation direction of the right traveling hydraulic motor 2 MR.
  • the controller 30 is not limited to this structure. Ordinarily, an actuator other than the traveling hydraulic motor 2 M, such as the boom cylinder 7 , is not operated during the traveling action. For this reason, the flow instruction generated by the flow rate command producing unit F 10 may be output to the regulator 13 of the main pump 14 . In this case, the controller 30 can control the traveling action of the shovel 100 by controlling the discharge amount of the main pump 14 . The controller 30 may control steering of the shovel 100 by controlling each of the left regulator 13 L and the right regulator 13 R.
  • the controller 30 may control the operation by controlling the amount of the hydraulic oil supplied to each of the left traveling hydraulic motor 2 ML and the right traveling hydraulic motor 2 MR by the proportional valve 31 and control the operation by controlling the regulator 13 to control the traveling speed.
  • the controller 30 can realize autonomous traveling of the shovel 100 from the present position to the target position.
  • the shovel 100 includes the lower traveling body 1 , the upper swiveling body 3 that is mounted on the lower traveling body 1 so as to be able to swivel, a traveling actuator that drives the lower traveling body 1 , and a controller 30 as a control device that is provided to the upper swiveling body 3 .
  • the controller 30 is configured to operate a traveling actuator based on information about a target position.
  • the traveling actuator is, for example, a traveling hydraulic motor 2 M. It may be a traveling electric motor. This arrangement allows the shovel 100 to reduce the burden on the traveling operation. This is because shovel 100 can be driven without having to continuously operate at least one of the drive lever 26 D and the drive pedal.
  • the shovel 100 may include a positioning device 73 for measuring the present position and a direction detection device 71 for detecting information regarding the relative relationship between the direction of the upper swiveling body 3 and the direction of the lower traveling body 1 .
  • the controller 30 may operate a control valve for the traveling actuator based on the output of the positioning device 73 and the output of the direction detector 71 .
  • at least one of the controlling valves 171 for the left-traveling hydraulic motor 2 ML and 172 for the right-traveling hydraulic motor 2 MR can be displaced even if neither the traveling lever 26 D nor the traveling pedal is operated.
  • the controller 30 can autonomously drive the shovel 100 while controlling the position and direction of the shovel 100 .
  • the shovel 100 may include an information acquisition device E 1 for acquiring information on the construction state.
  • the controller 30 may set the driving route based on the information on the target position and the information on the construction state and allow the lower traveling body 1 to travel along the traveling route.
  • the controller 30 may set a traveling route based on past travel trajectories and allow the lower traveling body 1 to travel along the traveling route.
  • the shovel 100 may be configured to autonomously travel along a traveling route set in various ways. With this arrangement, the shovel 100 reduces the burden on the operator with respect to the driving operation.
  • the controller 30 may be driven by the lower traveling body 1 in a state in which the direction of the upper swiveling object 3 is aligned with the direction of the lower traveling body 1 , and may travel by the lower traveling body 1 in a state in which the direction of the upper swiveling object 3 is different from the direction of the lower traveling body 1 .
  • the controller 30 may allow the shovel 100 to travel in an appropriate position depending on the distance at which the shovel 100 is driven autonomously and the condition of the route to travel.
  • a hydraulic operating system with a hydraulic pilot circuit is disclosed.
  • hydraulic oil fed from the pilot pump 15 to the left operation lever 26 L is transferred to the pilot ports of the control valves 176 L, 176 R at a flow rate proportional to the opening of the remote control valve which is opened and closed by tilting the left operation lever 26 L in the arm stretching direction.
  • the hydraulic oil supplied from the pilot pump 15 to the right operation lever 26 R is transferred to the pilot ports of the control valves 175 L, 175 R at a flow rate corresponding to the opening of the remote control valve which is opened and closed by tilting the right operation lever 26 R in the boom heightening direction.
  • an electric operating system with an electric pilot circuit may be employed.
  • the lever operation amount of the electric operation lever in the electric operation system is input to the controller 30 , for example, as an electric signal.
  • An electromagnetic valve is also disposed between the pilot pump 15 and the pilot port of each control valve. The electromagnetic valves are configured to operate in response to the electric signal from the controller 30 .
  • This arrangement allows the controller 30 to control the electromagnetic valves by an electric signal corresponding to the lever operation amount operated to increase or decrease the pilot pressure to move each control valve when it is manually operated using the electric operation lever.
  • Each control valve may be composed of an electromagnetic spool valve. In this case, the electromagnetic spool valve operates in response to electric signals from the controller 30 corresponding to the level of lever operation of the electric operation lever.
  • FIG. 11 illustrates an example of the structure of the electric operating system.
  • the electric operation system of FIG. 11 is an example of a left traveling operation system for rotating the left traveling hydraulic motor 2 ML.
  • the electric operation system mainly is formed by the control valve 17 of a pilot pressure operated type, a left traveling lever 26 DL as the electric operation lever, the controller 30 , an electromagnetic valve 60 for left forward traveling operation, and an electromagnetic valve 2 for left backward traveling operation.
  • swivel operation system for swiveling the upper swiveling body 3
  • boom operation system for moving the boom 4 up and down
  • arm operation system for opening and closing the arm 5
  • bucket operation system for opening and closing the bucket 6
  • the control valve 17 of a pilot pressure operated type includes a controlling valve 171 (see FIG. 3 ) for the left traveling hydraulic motor 2 ML, a controlling valve 172 (see FIG. 3 ) for the right traveling hydraulic motor 2 MR, a controlling valve 173 (see FIG. 3 ) for the swiveling hydraulic motor 2 A, a controlling valve 175 (see FIG. 3 ) for the boom cylinder 7 , a controlling valve 176 (see FIG. 3 ) for the arm cylinder 8 , and a controlling valve 174 (see FIG. 3 ) for the bucket cylinder 9 .
  • the electromagnetic valve 60 is configured to adjust the pressure of the hydraulic oil in the tube that connects the pilot pump 15 with a forward traveling side pilot port of the controlling valve 171 .
  • the electromagnetic valve 62 is configured to adjust the pressure of the hydraulic oil in the tube that connects the pilot pump 15 with a backward traveling side pilot port of the controlling valve 171 .
  • the controller 30 When a manual operation is conducted, the controller 30 generates a forward traveling operation signal (electric signal) or backward traveling operation signal (electric signal) in response to the operation signal (electric signal) output by the operation signal generation unit of the left traveling lever 26 DL.
  • the operation signal output by the operation signal generation unit of the left traveling lever 26 DL is an electric signal that varies according to the operation amount and operation direction of the left traveling lever 26 DL.
  • the controller 30 when the left traveling lever 26 DL is operated in the traveling forward direction, the controller 30 outputs a traveling forward operation signal (electric signal) corresponding to the lever operation amount to the electromagnetic valve 60 .
  • the electromagnetic valve 60 operates in response to the traveling forward operation signal (electric signal) to control the pilot pressure as a traveling forward operation signal (pressure signal) acting on the forward pilot port of the controlling valve 171 .
  • the controller 30 when the left traveling lever 26 DL is operated in the backward traveling direction, the controller 30 outputs the traveling backward operating signal (electric signal) corresponding to the lever operation amount to the electromagnetic valve 62 .
  • the electromagnetic valve 62 operates in response to the traveling backward operation signal (electric signal) to control the pilot pressure as a backward operation signal (pressure signal) acting on the traveling backward side pilot port of the controlling valve 171 .
  • the controller 30 When autonomous control is performed, the controller 30 generates the traveling forward operation signal (electric signal) or the traveling backward operation signal (electric signal) in accordance with a correction operation signal (electric signal) instead of, for example, responding to the operation signal (electric signal) output by the operation signal generation unit of the left traveling lever 26 DL.
  • the correction operation signal may be an electric signal generated by the controller 30 or an electric signal generated by a controller or the like other than the controller 30 .
  • FIG. 12 is a schematic diagram illustrating an example of the structure of the shovel management system SYS.
  • the management system SYS is a system that manages one or more shovels 100 .
  • the management system SYS includes primarily a shovel 100 , an assistive device 200 , and a management device 300 .
  • Each of the shovel 100 , the assistive device 200 , and the management device 300 forming the management system SYS may be a single unit or multiple units.
  • the management system SYS includes one shovel 100 , one assistive device 200 , and one management device 300 .
  • the assistive device 200 is typically a portable terminal device, such as a notebook PC, tablet PC, or smartphone carried by a worker or the like at a construction site.
  • the assistive device 200 may be a portable terminal device carried by an operator of the shovel 100 .
  • Assistive device 200 may be a fixed terminal device.
  • the management device 300 is typically a fixed terminal device.
  • a server computer installed in a management center or the like outside a construction site.
  • the management device 300 may be a portable computer (e.g., a portable terminal device such as a notebook PC, tablet PC, or smartphone).
  • At least one of the assistive devices 200 and the management device 300 may include a monitor and operation device for a remote control device.
  • the operator may operate the shovel 100 using the remote control device.
  • the remote control device is connected to a controller 30 mounted on a shovel 100 via, for example, a wireless communication network, such as a wireless communication network, a cellular telephone communication network, or a satellite communication network.
  • the setting screen GS illustrated in FIGS. 7 and 8 is typically displayed as a display device D 1 located in the cabin 10 , but may be displayed as a display device connected to at least one of the assistive device 200 and the management device 300 .
  • the controller 30 of the shovel 100 may transmit information about at least one of the time and location when the autonomous travel switch is pressed, the target route utilized when the shovel 100 is moved autonomously (during autonomous travel), and the path actually traced by the predetermined portion during autonomous travel to at least one of the assistive device 200 and the management device 300 .
  • the controller 30 may then transmit at least one of the outputs of the space recognition device 70 and an image captured by a single input camera to at least one of the assistants 200 and the management 300 .
  • the image may be a plurality of images captured during the autonomous travel.
  • the controller 30 may transmit information about at least one of the assistive device 200 and the management device 300 , such as data about the operation of the shovel 100 during autonomous travel, data about the attitude of the shovel 100 , and data about the attitude of the excavation attachment. To make information about the shovel 100 in autonomous traveling available to the operator using the assistive device 200 or to the administrator using the management device 300 .
  • the management system SYS of the shovel 100 enables information about the shovel 100 to be acquired the during autonomous travel to be shared with the manager and the other operator of the shovel.
  • the above-described means provide a shovel that can reduce burden on a traveling operation.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)
US17/036,326 2018-03-31 2020-09-29 Shovel Active 2041-08-31 US12018461B2 (en)

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114640827A (zh) * 2016-01-29 2022-06-17 住友建机株式会社 挖土机以及在挖土机的周围飞行的自主式飞行体
JP7374762B2 (ja) * 2019-12-27 2023-11-07 株式会社小松製作所 作業機械、計量方法、および作業機械を含むシステム
DE112022001727T5 (de) * 2021-03-25 2024-02-22 Sumitomo Heavy Industries, Ltd. Bagger- und bauverwaltungssystem
WO2022202918A1 (ja) 2021-03-26 2022-09-29 住友重機械工業株式会社 ショベル及びショベルの施工支援システム
JPWO2022210776A1 (zh) 2021-03-29 2022-10-06
DE112022002012T5 (de) * 2021-03-31 2024-03-07 Sumitomo Heavy Industries, Ltd. Bagger und Steuervorrichtung für Bagger
JP2023059397A (ja) * 2021-10-15 2023-04-27 株式会社小松製作所 作業機械のための表示システムおよび表示方法
WO2023085005A1 (ja) * 2021-11-10 2023-05-19 コベルコ建機株式会社 管理システム

Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0365769U (zh) 1989-10-31 1991-06-26
JPH05297942A (ja) 1992-04-20 1993-11-12 Fujita Corp 土工事の自動搬送システム
JPH07158117A (ja) 1993-12-08 1995-06-20 Hiroshi Ishizawa 掘削均平用自動制御装置及びその方法
JPH11154015A (ja) 1997-11-21 1999-06-08 Takahashi Works:Kk 車両の自動走行指令装置
JPH11154014A (ja) 1997-11-21 1999-06-08 Takahashi Works:Kk 車両の自動走行指令装置
JPH11154016A (ja) 1997-11-21 1999-06-08 Takahashi Works:Kk 車両の自動走行指令装置
JP2004132003A (ja) 2002-10-09 2004-04-30 Shin Caterpillar Mitsubishi Ltd 作業機械
JP2007051781A (ja) 2006-08-25 2007-03-01 Komatsu Ltd 油圧駆動機械の制御装置
JP2012172430A (ja) 2011-02-22 2012-09-10 Komatsu Ltd 油圧ショベルの位置誘導システム及び位置誘導システムの制御方法
US20120263566A1 (en) 2011-04-14 2012-10-18 Taylor Wesley P Swing automation for rope shovel
JP2014006577A (ja) 2012-06-21 2014-01-16 Hitachi Constr Mach Co Ltd 運搬機械の停止位置判定装置およびこの装置を備えた積込機械
JP2014055407A (ja) 2012-09-11 2014-03-27 Kayaba Ind Co Ltd 操作支援装置
WO2014155893A1 (ja) 2013-03-29 2014-10-02 東京計器株式会社 作業用車両の自動操舵システム
WO2015119263A1 (ja) 2014-02-06 2015-08-13 ヤンマー株式会社 自律走行作業車両の走行経路の設定方法
WO2015151359A1 (ja) 2014-03-31 2015-10-08 日立建機株式会社 車両走行管制システム及び管制サーバ
US20150312937A1 (en) 2012-08-03 2015-10-29 Sharp Kabushiki Kaisha Base station device, mobile station device, wireless communication method, and integrated circuit
US20160024757A1 (en) * 2013-04-10 2016-01-28 Komatsu Ltd. Construction management device for excavation machinery, construction management device for excavator, excavation machinery, and construction management system
WO2016143670A1 (ja) 2015-03-10 2016-09-15 株式会社小松製作所 作業車両の制御システム、制御方法、および作業車両
WO2016152700A1 (ja) 2015-03-20 2016-09-29 住友建機株式会社 ショベル
JP2017014726A (ja) 2015-06-29 2017-01-19 日立建機株式会社 作業機械の作業支援システム
JP2018022353A (ja) 2016-08-04 2018-02-08 三菱電機株式会社 車両走行制御装置、車両走行制御システムおよび車両走行制御方法
US20190249391A1 (en) * 2017-03-29 2019-08-15 Hitachi Construction Machinery Co., Ltd. Work machine
US11041288B2 (en) * 2017-02-21 2021-06-22 Hitachi Construction Machinery Co., Ltd. Work machine

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3243411B2 (ja) * 1996-02-26 2002-01-07 新キャタピラー三菱株式会社 走行用油圧モータの制御回路
JP3218299B2 (ja) * 1997-01-09 2001-10-15 住友建機製造株式会社 建設機械の走行速度制御回路
JP2001287674A (ja) * 2000-04-06 2001-10-16 Hitachi Constr Mach Co Ltd 建設機械の安全確認装置
JP5090527B2 (ja) * 2008-05-29 2012-12-05 住友建機株式会社 旋回駆動制御装置及びこれを含む建設機械
US8983738B2 (en) * 2010-02-23 2015-03-17 Israel Aerospace Industries Ltd. System and method of autonomous operation of multi-tasking earth moving machinery
JP6253567B2 (ja) * 2014-11-17 2017-12-27 ヤンマー株式会社 作業車両の移動システム
WO2016088894A1 (ja) * 2014-12-05 2016-06-09 住友重機械工業株式会社 ショベル及びショベルの制御方法
JP6689729B2 (ja) 2016-10-25 2020-04-28 積水化学工業株式会社 有機組成物、有機組成物の製造方法および燃料

Patent Citations (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0365769U (zh) 1989-10-31 1991-06-26
JPH05297942A (ja) 1992-04-20 1993-11-12 Fujita Corp 土工事の自動搬送システム
JPH07158117A (ja) 1993-12-08 1995-06-20 Hiroshi Ishizawa 掘削均平用自動制御装置及びその方法
JPH11154015A (ja) 1997-11-21 1999-06-08 Takahashi Works:Kk 車両の自動走行指令装置
JPH11154014A (ja) 1997-11-21 1999-06-08 Takahashi Works:Kk 車両の自動走行指令装置
JPH11154016A (ja) 1997-11-21 1999-06-08 Takahashi Works:Kk 車両の自動走行指令装置
JP2004132003A (ja) 2002-10-09 2004-04-30 Shin Caterpillar Mitsubishi Ltd 作業機械
JP2007051781A (ja) 2006-08-25 2007-03-01 Komatsu Ltd 油圧駆動機械の制御装置
JP2012172430A (ja) 2011-02-22 2012-09-10 Komatsu Ltd 油圧ショベルの位置誘導システム及び位置誘導システムの制御方法
US20120263566A1 (en) 2011-04-14 2012-10-18 Taylor Wesley P Swing automation for rope shovel
JP2014006577A (ja) 2012-06-21 2014-01-16 Hitachi Constr Mach Co Ltd 運搬機械の停止位置判定装置およびこの装置を備えた積込機械
US20150312937A1 (en) 2012-08-03 2015-10-29 Sharp Kabushiki Kaisha Base station device, mobile station device, wireless communication method, and integrated circuit
JP2014055407A (ja) 2012-09-11 2014-03-27 Kayaba Ind Co Ltd 操作支援装置
US9708001B2 (en) 2013-03-29 2017-07-18 Tokyo Keiki Inc. Automatic steering system for working vehicle
WO2014155893A1 (ja) 2013-03-29 2014-10-02 東京計器株式会社 作業用車両の自動操舵システム
US20160024757A1 (en) * 2013-04-10 2016-01-28 Komatsu Ltd. Construction management device for excavation machinery, construction management device for excavator, excavation machinery, and construction management system
US20170168501A1 (en) 2014-02-06 2017-06-15 Yanmar Co., Ltd. Method for Setting Travel Path of Autonomous Travel Work Vehicle
WO2015119263A1 (ja) 2014-02-06 2015-08-13 ヤンマー株式会社 自律走行作業車両の走行経路の設定方法
WO2015151359A1 (ja) 2014-03-31 2015-10-08 日立建機株式会社 車両走行管制システム及び管制サーバ
WO2016143670A1 (ja) 2015-03-10 2016-09-15 株式会社小松製作所 作業車両の制御システム、制御方法、および作業車両
US20180002894A1 (en) 2015-03-10 2018-01-04 Komatsu Ltd. Control system for work vehicle, control method, and work vehicle
WO2016152700A1 (ja) 2015-03-20 2016-09-29 住友建機株式会社 ショベル
US20180002895A1 (en) 2015-03-20 2018-01-04 Sumitomo(S.H.I.) Construction Machinery Co., Ltd. Shovel
JP2017014726A (ja) 2015-06-29 2017-01-19 日立建機株式会社 作業機械の作業支援システム
US20190003152A1 (en) 2015-06-29 2019-01-03 Hitachi Construction Machinery Co., Ltd. Work assist system for work machine
JP2018022353A (ja) 2016-08-04 2018-02-08 三菱電機株式会社 車両走行制御装置、車両走行制御システムおよび車両走行制御方法
US11041288B2 (en) * 2017-02-21 2021-06-22 Hitachi Construction Machinery Co., Ltd. Work machine
US20190249391A1 (en) * 2017-03-29 2019-08-15 Hitachi Construction Machinery Co., Ltd. Work machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
International Search Report for PCT/JP2019/014530 dated Jun. 25, 2019.

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JP2023115325A (ja) 2023-08-18
EP3779059A1 (en) 2021-02-17
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CN112368449A (zh) 2021-02-12
EP3779059A4 (en) 2021-11-10
EP3779059B1 (en) 2023-10-11
KR102608801B1 (ko) 2023-11-30
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JP7307051B2 (ja) 2023-07-11
US20210010241A1 (en) 2021-01-14

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